js怎么拼接变量

let name = "Alice";
let age = 25;
let greeting = "My name is " + name + " and I am " + age + " years old.";
console.log(greeting); // 输出: My name is Alice and I am 25 years old.

let name = "Alice";
let age = 25;
let greeting = `My name is ${name} and I am ${age} years old.`;
console.log(greeting); // 输出: My name is Alice and I am 25 years old.

let name = "Alice";
let age = 25;
let greetingParts = ["My name is", name, "and I am", age, "years old."];
let greeting = greetingParts.join(" ");
console.log(greeting); // 输出: My name is Alice and I am 25 years old.

let name = "Alice";
let age = 25;
let greeting = "My name is ".concat(name, " and I am ", age, " years old.");
console.log(greeting); // 输出: My name is Alice and I am 25 years old.

let num = 25;
let str = "The number is " + num.toString(); // 或者 "The number is " + String(num);
console.log(str); // 输出: The number is 25

let parts = [];
for (let i = 0; i < 1000; i++) {
    parts.push("Number " + i);
}
let result = parts.join(", ");
console.log(result);